From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
	id D3CF03858D32; Mon, 16 Jan 2023 07:00:14 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org D3CF03858D32
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1673852414;
	bh=B/dCSwUkEzYkKqnmT2CiJ9Gksiu5FElZI3WkXjEvyhU=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=N28wTVnl2XYcoYhf7CjVZGUIEXilFxf5TpcNxtjeAzgvltEkKpLlOyI1RvvAOSBm1
	 dl8sfVYt5f6kpsQBeoNPltyUQ0HsT4rmSL/kxHqMf5e5LAdLXXq6SZhRpSaAtukXrV
	 mfJn0iFPTv8eKq+YAUOCLJ7uhgLT4l+rlWiAZ/cw=
From: "amewo22370 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/108414] template meta programming
Date: Mon, 16 Jan 2023 07:00:13 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 12.2.0
X-Bugzilla-Keywords: c++-lambda, rejects-valid
X-Bugzilla-Severity: normal
X-Bugzilla-Who: amewo22370 at gmail dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-108414-4-lO4zOxWyjr@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-108414-4@http.gcc.gnu.org/bugzilla/>
References: <bug-108414-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108414

--- Comment #2 from =D0=95=D0=B2=D0=B3=D0=B5=D0=BD=D0=B8=D0=B9 =D0=9B=D0=B8=
=D1=81=D0=B8=D1=86=D1=8B=D0=BD <amewo22370 at gmail dot com> ---
(In reply to Andrew Pinski from comment #1)
> > using nth_element_t =3D typename decltype([]<typename T>(const indexed<=
I, T>&){return std::type_identity<T>{};}(make_indexer<Ts...>()))::type;
>=20
> There are some known issue with lambda inside a decltype which seems like
> might be causing issues here ...

interesting that 'typedef' and 'using' have different behavior=